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參數(shù)資料
| 型號(hào)： | S-812C44AUA-C2Y-T2 |
| 元件分類： | 固定正電壓?jiǎn)温份敵鯨DO穩(wěn)壓器 |
| 英文描述： | 4.4 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PSSO3 |
| 封裝： | SOT-89, 3 PIN |
| 文件頁數(shù)： | 7/49頁 |
| 文件大?。?/td> | 873K |
| 代理商： | S-812C44AUA-C2Y-T2 |
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HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
Rev.2.0_01
S-812C Series
Seiko Instruments Inc.
15
3. Shutdown function (ON/OFF pin)
The ON/OFF pin controls the start and stop of the regulation operation.
When the ON/OFF pin is set to shutdown level, halting whole internal circuit and turning off the Pch MOS
FET between VIN and VOUT pins, current consumption is drastically reduced. The voltage of the VOUT
pin becomes VSS level due to the internal resistance divider of several M
between VOUT and VSS.
The ON/OFF pin should not be left afloat since no pull-up nor pull-down is made internally as shown in
Figure 16. Note also that a current will flow to the VIN side via the parasitic diode inside the IC if a
voltage of VIN + 0.3 V or more is applied. When the shutdown function is not used, connect the pin to the
VIN pin in case of positive logic and to the VSS pin in case of negative logic.
When a regulation operation at light load less than 100
A is halted, output voltage may increase. If the
increase of the output voltage should be avoided, pull down the VOUT pin to the VSS level as soon as
ON/OFF pin goes to the shutdown level.
Table 10
Logic Type
ON/OFF Pin
Internal Circuits
VOUT Pin Voltage
Current Consumption
B
“L”: Power off
Stopped
VSS level
ISS2
B
“H”: Power on
Operating
Set value
ISS1
VIN
ON/OFF
VSS
Figure 16
4. Short-circuit protection
Installation of the short-circuit protection which protects the output transistor against short-circuit between
VOUT and VSS can be selected in the S-812C series. The short-circuit protection controls output current
as shown in the typical characteristics, (1) OUTPUT VOLTAGE versus OUTPUT CURRENT, and
suppresses output current at about 40 mA even if VOUT and VSS pins are short-circuited.
The short-circuit protection can not at the same time be a thermal protection. Attention should be paid to
the Input voltage and the load current under the actual condition so as not to exceed the power
dissipation of the package including the case for short-circuit.
When the output current is large and the difference between input and output voltage is large even if not
shorted, the short-circuit protection may work and the output current is suppressed to the specified value.
Products without short-circuit protection can provide comparatively large current by removing a short-
circuit protection.
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| S-812C53AMC-C3H-T2 | 5.3 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PDSO5 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-812C44AUA-C2YT2G | 功能描述:低壓差穩(wěn)壓器 - LDO 4.4V 1.0uA 2.0% RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| S-812C44AY-B | 功能描述:低壓差穩(wěn)壓器 - LDO 4.4V 1.0uA 2.0% RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| S-812C44AY-B2-U | 功能描述:低壓差穩(wěn)壓器 - LDO 4.4V 1.0uA 2.0% RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| S-812C44AY-B-G | 制造商:Seiko Instruments Inc (SII) 功能描述:IC REG LDO 4.4V 0.065A TO92-3 |
| S-812C44AY-X | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR |
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